Improved machine foe dressing stone



. part of thisspccication, in which- @aith tats latnt @ffice WiLLiAM M. MURREY, or TIFFIYN, oHio.,

Leners Patent No. 62,056, and February 12, iso?.

IMPROVED MACHINE POR DRESSING STONE.

T0 Alli) WHOM IT MAY CONCERN:

Be it known that I, WILLIAM- M. MURREY, of Tiffin, iu the county of Seneca, and State of Ohio, have invented a new and improved Machine for Dressing Millstones; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying:r drawings, making a Figure l, sheet 1, is an elevation of one side of the machine. l

Figure 2 is an elevation of the front of the machine, as seen by taking a section in the vertical plane indicated by red line w a1.

Figure 3, sh'eet2, is a plan view of the machine, as seen by a horizontal section taken in. the plane indicated by red line gy, fig. l. I j l Figure 4 is a sectional view, showing the shaft, which operates the pick out of geen Figure 5 is a view-of the hook-fastenings which attach the machine to the spindle of the bed-stone.

Similar letters of reference indicate corresponding parts in the several figures.V

The invention which forms the subject of this application provides for attaching the machine to the runner or the bed-stone in such manner that the machine can be adjusted and set at any desired angle, according to the angle of the furrows; also for raising and lowering the fulcrum ofthe vibrating pick-handle, whether the pick be in motion or at rest, for the purpose of regulating the depth of'the furrows or channels in the surface of the stone; also for adjusting the main frame upon its bed, toward or from the centre of the stone, orlat right angles to such adjustment, as may be desired; also for increasing or diminishing the speed of theipick, or stopping the motion thereof, without'changing or stopping the motion of the main driving-shaft, all as will be hereinafter described. i

To enable othersskilled in the art to understand my inventionfl will' describe its construction and operation.

The horizontal bed-frame, upon which the main frame Ais supported and adjusted, consists of two'longitudinal beams A1 A1, connected togetherat their ends by means of transverseV bars A2 A3, thus formingea rectangular frame or foundation, which is supported uponthe surface of the stone to be dressed, and attached thereto by means of a hook, A4, atone end,and a'set-screw, a, at the other end. If the stone has an eye through it, the hook A4 is used; if it has no eye7 -but a spindle, then the hooks shown in iig. 5 are used. The hook A is pivoted by its horizontal arm to the middle of the perforated bar A, andsteadied by the semicircular piece al, which receives a grooved head on the upper part of hook A, as shown in fig. 3. This hook enters 'the eye of the running stone, and lholds theV machine at this peint'. The set-screw passes through a bracket, which V projects down from the rack-bar A5, and secures` the machine down in place by setting this screw up tightly against the periphery of the stone. 'lhe inner edges of the beams Al Al are grooved,for receiving'thc tenons on the ends of the two transverse bars B B, which latter are connected together at their ends by cross-pieces shown in iig. rlhe inner edges'ofthe bars B are grooved, forV receiving tenons, whieh are formed on the sides of frame A, which secures this frame down in place, and allou'svit to be adjusted in a direction at right angles to the beams Al A. The frame A is adjusted in4 adirection with the length of the beams A Al by means of a toothed roller, B1, which has its bearing upon frame A, and which engages with a rack, A5, that is secured to bars A A at an equal distance from the bars A1. On one end of the toothed roller B1, outside of the frame A, a toothed wheel, a?, is keyed, and on the extreme outer end of the said roller-shaft a lever, is loosely pivoted, which carries a. double pawl, a4. By means f lever B3 the frame A and base-frame'B can be adjusted toward and from the eye ofthe stone. The toothed roller Bl is of such length as to admit of the proper adjustment of' the-frame A upon its bars B in a direction with these liars, without said roller becoming disengaged from iisirack 132. Frame A is adjusted upon its bars B by means of racks b Zz on these bars, which receive the teeth of pinion spur-wheels bl bl on the ends of a shaft, b2, which has its bearings on frame A. This shaft b2 receives a slow motion from a shaft, c, through the medium of gear-wheels c c2 03.04, and the shaft e receivesJ motion from the main driving-shaft through the medium of spurfwheels d cZ d2. The shaft c has its bearings in frame A at one end, and in the lower end of ,a iever, C, at'the other end; so that, by means of this lever, one end of the shaft c can be depresseihjs'o 's'rto move the spur-wheel d2 out of gear from the pinion-wheel on the main shaft D,`thus stopping the movement. of' slia'ft c and the parts which this shaft is designed to. operate.

The pick E is secured on the free end of the vibrating arm-E, which vibrates between vertical guides of frame A, and is pivoted at its rear end to a vertically-adjustable block, d3, to' which a link, e, is pivoted. The upper end of this link is pivoted to a lever, el, which, in turn, is -pivoted to a nut, e2, through vwhich a screw-rod, f, passes. By turning this screw-rodf, the fulcrum block d can be raised or depressed, and the depth of stroke of the pick regulated. This screw-sliaft f1nay be adjusted by hand, if desired, but I have provided means whereby the shaftf canbe rotated by motion imparte-d to itfroin the main shaft. Near the lower end of the screwf is a bevel spur-wheehfl, which engages with a spur-wheehfl, on a sh-ort shaft, f3, shown in iig. l. This shaftf3 carries a belt-wheel, g, aroundwhichy passes a belt, gl, that also passes around n. belt-wheel, g2, on the vshaft c. The wheel g2 has a side movement allowed it, for the purpose of engaging and disengaging it with its shaft e. The lever F is used for moving the wheel g2 laterally, and stopping and starting the screw'f, at pleasure. The arm El of the pick is connected to awvrist-piir applied concentrically to the surface of a ily-wheel, G, by means of a pitmam'Gl. The shaft of; the fly-wheel G has its bearings upon a vibrating frame, A, which isconnected to the lever I by a forked rod, Il, so that by vibrating this lever the frame H, With its ily-wheel shaft, will be vibrated, and thus the pinion spur-wheel L may be made to engage with either one of the spur-wheels d 0r j; or, if desirable, the wheel L may be held in a position where it will not engage with either one of said wheels. The large spur-whe'elj is keyed on a shaft, k, and receives a rapid motion from the large wheel d by means of a pinion, k1, on shaft 7c, shown in iig. 4. When 'the pinion-wheel L engages with therwheel j, the pick receives a more rapid motion than is communicated to it when pinion h is in gear with the driving-wheel d. Thus a rapid or slow motion can be communicated to the pickpat pleasure, without changing the motion of the main driving-shaft. The device shown in fig. 5 is designed to be used instead of the hook A4 shown in figs. 1 andB. The hook A4 is used, as before stated, for attaching the bed of the machine to the eye of the runner" stone by hooking into this eye. The device shown in iig. 5 is designed for attaching the bed of the machine to the central spindle of the bed-stone', and for this purpose the hook A4 and bow al are removed from the bar A3, andthe device of fig. 5 attached to this-bar. This device consists of two hooks m m, formed on one end of a. rod, ml, the other end of which has astud formed on it, which enters one of the several holes-in bar A3. This device is steadied by a diagonal brace, n, which also hooks into one of the holes in said bar A3. Thetwo hooks lm m are used for attaching the machine to the spindle of the stone, so that the former may be moved toward the right or toward the left. One. hook e'nbraces the spindle when it is desired to move the machine to the right, and the other hook is used when the machine is to be moved toward the left. When the machine has been-secured down upon the face vof a millstone, as above described, and the main driving-shaft D set in motion,

y the operator moves lever 4F'so as to regulate the height ofthe rear endof arm E according to the depth of cut required. The lever I is then adjusted according to the speed required, so as to engage the pinion-wheel L `with eitherone of the wheels orj. When the proper adjustment of the rear end of arm E has been effected,

the lever F is moved, so as to disengage the belt-wheel g2 from its shaft c, thus stopping the movement of the screw f.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. Supporting the adjustable frame A, which carries the vibrating pick, and the mechanism for operating it' upon a bed-frame, A1 and an adjustable frame, B, in such manner that frame A can be adjusted substantially as described. Y

2. The combination of the adjusting screw a, hook A", stay a, and perforated cross-bar A3, with the bed- -frame A1, substantially in the manner described. il

A 3. The construction of the device m m1 n, for the purpose and in the manner substantially asldescribed.

4. Pivoting the pick-arm E to a vertically adjustable block, di", substantially as and for the purpose described.

5. The means, substantially as described, Vfor adjusting the fulcrum-block for raising and depressing the -rear end of the hammer arm.

6. The application of the shaft of wheel Gr to a vibrating frame, H, substantially as described.

.7. The combination of vibrating frame H, pinion-wheel L, and spur-wheels d and j, arranged and operating substantially as described.

8. Supporting-shaft c, carrying the parts described, at one end by frame A, and at the other end upoirthe end of a lever C, substantially as and for the purposes described.

' WILLIAM M. MURREY.

Witnesses: o

WARREN P. N onLn, HARRISON Nonna. 

